Re: [BUG] vfio device assignment regression with THP ref counting redesign

[Andrea Arcangeli]

Hello Alex,

On Wed, May 04, 2016 at 07:19:27PM -0600, Alex Williamson wrote:
> On Mon, 2 May 2016 20:03:07 +0200
> Andrea Arcangeli <aarcange@xxxxxxxxxx> wrote:
> 
> > On Mon, May 02, 2016 at 07:00:42PM +0300, Kirill A. Shutemov wrote:
> > > Agreed. I just didn't see the two-refcounts solution.  
> > 
> > If you didn't do it already or if you're busy with something else,
> > I can change the patch to the two refcount solution, which should
> > restore the old semantics without breaking rmap.
> 
> I didn't see any follow-up beyond this nor patches on lkml.  Do we have
> something we feel confident for posting to v4.6 with a stable backport
> to v4.5?  Thanks,

I'm currently testing this: